我正在尝试创建生产者并从intellij idea发送一些数据给它，但是在运行这个程序时我得到了像
ERROR org.apache.kafka.common.utils.KafkaThread - Uncaught exception in thread 'kafka-producer-network-thread 我为这个程序编写的代码就像
package Kafka;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.ProducerConfig;
import org.apache.kafka.clients.producer.ProducerRecord;
import org.apache.kafka.common.serialization.StringSerializer;
import java.util.Properties;
public class First_Producer {
public static void main(String[] args) {
String bootstrapserver = "127.0.0.1:9092";
//create producer properties
Properties properties = new Properties();
properties.setProperty(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,bootstrapserver);
properties.setProperty(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
properties.setProperty(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,StringSerializer.class.getName());
//create the producer
KafkaProducer<String,String> producer= new KafkaProducer<String,String>(properties);
//create a producer record
ProducerRecord<String, String> record = new ProducerRecord<String,String>("first_topic","hello_world");
//send data
producer.send(record);
producer.flush();
producer.close();
}
}
pom.xml 文件
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.example</groupId>
<artifactId>KafkaProject</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.apache.kafka/kafka-clients -->
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka-clients</artifactId>
<version>2.6.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.30</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.spark/spark-sql-kafka-0-10 -->
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql-kafka-0-10_2.12</artifactId>
<version>3.0.0-preview</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
运行时出现错误
C:\Java\jdk1.8.0_161\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.1.4\lib\idea_rt.jar=7640:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.1.4\bin" -Dfile.encoding=UTF-8 -classpath C:\Java\jdk1.8.0_161\jre\lib\charsets.jar;C:\Java\jdk1.8.0_161\jre\lib\deploy.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\access-bridge-64.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\cldrdata.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\dnsns.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\jaccess.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\jfxrt.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\localedata.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\nashorn.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\sunec.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\sunjce_provider.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\sunmscapi.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\sunpkcs11.jar;C:\Java\jdk1.8.0_161\jre\lib\ext\zipfs.jar;C:\Java\jdk1.8.0_161\jre\lib\javaws.jar;C:\Java\jdk1.8.0_161\jre\lib\jce.jar;C:\Java\jdk1.8.0_161\jre\lib\jfr.jar;C:\Java\jdk1.8.0_161\jre\lib\jfxswt.jar;C:\Java\jdk1.8.0_161\jre\lib\jsse.jar;C:\Java\jdk1.8.0_161\jre\lib\management-agent.jar;C:\Java\jdk1.8.0_161\jre\lib\plugin.jar;C:\Java\jdk1.8.0_161\jre\lib\resources.jar;C:\Java\jdk1.8.0_161\jre\lib\rt.jar;D:\KafkaProject\target\classes;D:\KafkaProject\slf4j-simple-1.7.30.jar;C:\Users\vishal\.m2\repository\org\apache\kafka\kafka-clients\2.6.0\kafka-clients-2.6.0.jar;C:\Users\vishal\.m2\repository\com\github\luben\zstd-jni\1.4.4-7\zstd-jni-1.4.4-7.jar;C:\Users\vishal\.m2\repository\org\lz4\lz4-java\1.7.1\lz4-java-1.7.1.jar;C:\Users\vishal\.m2\repository\org\xerial\snappy\snappy-java\1.1.7.3\snappy-java-1.1.7.3.jar;C:\Users\vishal\.m2\repository\org\slf4j\slf4j-api\1.7.30\slf4j-api-1.7.30.jar;C:\Users\vishal\.m2\repository\org\slf4j\slf4j-simple\1.7.30\slf4j-simple-1.7.30.jar Kafka.First_Producer
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/D:/KafkaProject/slf4j-simple-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/Users/vishal/.m2/repository/org/slf4j/slf4j-simple/1.7.30/slf4j-simple-1.7.30.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.SimpleLoggerFactory]
[main] INFO org.apache.kafka.clients.producer.ProducerConfig - ProducerConfig values:
acks = 1
batch.size = 16384
bootstrap.servers = [127.0.0.1:9092]
buffer.memory = 33554432
client.dns.lookup = use_all_dns_ips
client.id = producer-1
compression.type = none
connections.max.idle.ms = 540000
delivery.timeout.ms = 120000
enable.idempotence = false
interceptor.classes = []
internal.auto.downgrade.txn.commit = false
key.serializer = class org.apache.kafka.common.serialization.StringSerializer
linger.ms = 0
max.block.ms = 60000
max.in.flight.requests.per.connection = 5
max.request.size = 1048576
metadata.max.age.ms = 300000
metadata.max.idle.ms = 300000
metric.reporters = []
metrics.num.samples = 2
metrics.recording.level = INFO
metrics.sample.window.ms = 30000
partitioner.class = class org.apache.kafka.clients.producer.internals.DefaultPartitioner
receive.buffer.bytes = 32768
reconnect.backoff.max.ms = 1000
reconnect.backoff.ms = 50
request.timeout.ms = 30000
retries = 2147483647
retry.backoff.ms = 100
sasl.client.callback.handler.class = null
sasl.jaas.config = null
sasl.kerberos.kinit.cmd = /usr/bin/kinit
sasl.kerberos.min.time.before.relogin = 60000
sasl.kerberos.service.name = null
sasl.kerberos.ticket.renew.jitter = 0.05
sasl.kerberos.ticket.renew.window.factor = 0.8
sasl.login.callback.handler.class = null
sasl.login.class = null
sasl.login.refresh.buffer.seconds = 300
sasl.login.refresh.min.period.seconds = 60
sasl.login.refresh.window.factor = 0.8
sasl.login.refresh.window.jitter = 0.05
sasl.mechanism = GSSAPI
security.protocol = PLAINTEXT
security.providers = null
send.buffer.bytes = 131072
ssl.cipher.suites = null
ssl.enabled.protocols = [TLSv1.2]
ssl.endpoint.identification.algorithm = https
ssl.engine.factory.class = null
ssl.key.password = null
ssl.keymanager.algorithm = SunX509
ssl.keystore.location = null
ssl.keystore.password = null
ssl.keystore.type = JKS
ssl.protocol = TLSv1.2
ssl.provider = null
ssl.secure.random.implementation = null
ssl.trustmanager.algorithm = PKIX
ssl.truststore.location = null
ssl.truststore.password = null
ssl.truststore.type = JKS
transaction.timeout.ms = 60000
transactional.id = null
value.serializer = class org.apache.kafka.common.serialization.StringSerializer
[main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka version: 2.6.0
[main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka commitId: 62abe01bee039651
[main] INFO org.apache.kafka.common.utils.AppInfoParser - Kafka startTimeMs: 1600385581070
[kafka-producer-network-thread | producer-1] ERROR org.apache.kafka.common.utils.KafkaThread - Uncaught exception in thread 'kafka-producer-network-thread | producer-1':
java.lang.NoClassDefFoundError: com/fasterxml/jackson/databind/JsonNode
at org.apache.kafka.common.requests.ApiVersionsRequest$Builder.<clinit>(ApiVersionsRequest.java:36)
at org.apache.kafka.clients.NetworkClient.handleConnections(NetworkClient.java:910)
at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:555)
at org.apache.kafka.clients.producer.internals.Sender.runOnce(Sender.java:325)
at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:240)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.databind.JsonNode
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:338)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 6 more
[main] INFO org.apache.kafka.clients.producer.KafkaProducer - [Producer clientId=producer-1] Closing the Kafka producer with timeoutMillis = 9223372036854775807 ms.
Process finished with exit code 0
所以，这都是我的代码，我正在尝试创建一个卡夫卡生产者，但我收到了如上所述的错误。所以请任何人都可以帮助我解决这个问题
我遇到了同样的问题，通过添加以下依赖项，问题得到了解决。
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.10.3</version>
</dependency>
如果使用 Kubernetes pod，请考虑以下 Redpanda 团队的建议： 第二个选项是将当前的 snappy 版本替换为本机版本。推荐命令： apk 添加 --no-cache gcompat